DTC C0121 Valve Relay Circuit Malfunction
#2
On The Tree
Found this on a website. Not sure if it is vehicle specific but its a start. Yours should be very similar. If you know anybody at a dealer or can sweet talk them you may be able to get a diag chart from them.
"The solenoid valve relay is an internal relay inside the EBCM (elctronic brake control module).
It recieves 12 volts anytime the key is in the "on" position.
The EBCM does a self diagnostic to see if it is functioning. The diagnosis chart is quite straight forward.....
Check for 12volts into ebcm connector terminals 15(pink), 17(red), 18(orange). They get power from 3 different abs fuses in the undeerhood fuse block. Check all fuses, then check for power at the module connector. If power at all 3 wires, the it is a bad EBCM."
"The solenoid valve relay is an internal relay inside the EBCM (elctronic brake control module).
It recieves 12 volts anytime the key is in the "on" position.
The EBCM does a self diagnostic to see if it is functioning. The diagnosis chart is quite straight forward.....
Check for 12volts into ebcm connector terminals 15(pink), 17(red), 18(orange). They get power from 3 different abs fuses in the undeerhood fuse block. Check all fuses, then check for power at the module connector. If power at all 3 wires, the it is a bad EBCM."
#6
The fuse does not just blow on it's own, you have an issue mainly short to ground. I will have to check my manual to see the wiring diagram to get a better understanding. For example if circuit #1234 is B+ that circuit #1234 is shorted to ground causing your fuse to blow. What you need to check is check end to end for a short to ground and/or high resistance in that circuit. I hope you find this helpful?
Thank you
Thank you
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Davis1979 (04-20-2024)
#7
The fuse does not just blow on it's own, you have an issue mainly short to ground. I will have to check my manual to see the wiring diagram to get a better understanding. For example if circuit #1234 is B+ that circuit #1234 is shorted to ground causing your fuse to blow. What you need to check is check end to end for a short to ground and/or high resistance in that circuit. I hope you find this helpful?
Thank you
Thank you